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(No Model.) 2 Sheets--Sheet 1.

' T. HUNTER.

Bakers Oven.

No. 232,184. Patented Sept.'14,1880.

WwNEssEs (No Model.) 2 Sheets-Sheet 2.

T. HUNTER. Bakers Oven.

Nq. 232,184. "r atented Sept. 14, I880.

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UNITED STATES PATENT OFFICE.

THOMAS HUNTER, OF TORONTO, ONTARIO, CANADA.

BAKERS OVEN.

SPECIFICATION forming part of Letters Patent No. 232,184, datedSeptember 14, 1880.

Application filed April 22, 1880. (No model.)

To all whom it may concern:

Be it known that I, THOMAS HUNTER, of the city of Toronto, in the countyof York, in the Province of Ontario, Canada, builder, have inventedcertain new and useful Improvements in Bakers Ovens, of which thefollowing is a specification.

My invention relates to improvements in bakers ovens and it consistsofcertain details of construction and arrangement of dues, ashereinafter more fully set forth, and pointed out in the claims.

Figure 1 is a sectional plan through a I). Fig. 2 is a sectionalelevation through c d. Fig. 3 is a front view, partly in section.

In the drawings, like letters indicate corresponding parts in eachfigure.

A is the sole of the oven; B, the grate of the fire-pot or furnace. O isthe door of the furnace, placed above the grate B.

It will be found preferable to bevel the brickwork leading from thefurnace-door G to the furnace, as the coal will be more readily fed downthe inclined guide D, besides affording a clear view of the fire fromthe door.

In addition to the main flue E, which is situated as in other ovens, Imake a flue, F, leading from the back of the oven, below the solethereof, to the vertical main flue G. This flue F is for the purpose ofdrawing the caloric from the front of the oven to the rear, thus causingan even distribution of the heat within the oven.

With the view of carrying away the dust and light ashes from thefurnace, I make aflue, H, leading from below the grate B to the verticalflue G. Besides acting as an escape-pipe for the dust and light ashesfalling from the grate B, this flue II, when its damper is open,produces a downward draft, checking the fire, and at the same timeholding down the dust and light ashes, which might otherwise bedistributed over the sole of the oven.

In my improved oven the fire is made on the grate B, and owing to thearrangement of the flues E and F the heat is evenly distributed over theoven. The fine F draws the caloric to the back of the oven down towardthe sole, while the flue E draws a share of the heat to the side of theoven opposite to the furnace, and the natural rising tendency of thecaloric heats the crown of the oven to the proper temperature. When theoven is heated ready for baking the dough is put in the usual waythrough the door I, and the dampers of the lines E, F,

and H are closed to retain the moisture thrown off by the bread duringthe process of baking. The fire remains on the grate B, and can bereplenishedat any time to prevent the oven falling below the requisitetemperature.

On reference to the drawings it will be noticed that the grate B is thesame in construction as the grate used in base-burners, being arrangedso that it can be shaken horizontally and also tilted to dump the coaland ashes into the ash-pit. In order to apply it to the oven I set inthe brick-work, as shown, a metal ring, g, having three sockets, 1 2 3,to receive the ends of the spider h, which supports and forms part ofthe grate B.

It will be noticed that I place underneath the grate B a grate, K, tocatch the cinders and separate them from the line ashes. This auxiliaryor cinder-sifting grate will be found of great advantage as aneconoinizer of fuel.

I am aware that an oven provided with a recess in one of its interiorfront walls for the reception of the fire, a part of the products ofcombustion from which passes under the sole of the furnace, hasheretofore been employed, and I therefore lay no claim, broadly, to suchinvention, in which the products of combustion pass into the side wallsunder the sole of the oven, whereas in my construction a part of theproducts of combustion pass across the interior and into the back wallof the oven, and thence under its sole, thus heating effectually therear of the oven, which is notthe case in theinvention disclaimed.

What I claim as my invention is- 1. The combination of the oven A,provided with a recess in one of its front interior walls, of a fire-potoccupying said recess, and a flue, F, having its ingress-opening for apart of the products of combustion from the fire-pot in the rear of theoven, said flue extending thence under the sole of the oven, wherebysuch part of the products of combustion passes directly across theinterior of the oven, from front to rear, and thence under its sole,substantially as described.

2. The combination, with the oven A, of a fire-pot, a flue, F, with itsin gressopening for a part of the products of combustion from thefire-pot, located in the opposite wall of the oven from the fire-pot,and extending thence under the sole of the oven, and a fine, E, in thefront wall of the oven, carrying the products of combustion passingacross the front of the interior of the oven, whereby the products ofcombustion passing into the interior of the oven are evenly distributedin their passage from the fire-pot, substantially as described.

3. The combination, with the oven A, having a side recess, as set forth,of a fire-pot located in said recess, flues E F, having theiringress-openings for the products of combustion in the front and rearwalls of the oven, and discharge-flue Gr, substantially as described,and for the purpose set forth.

4. The combination, with the oven A, havin g a side recess and a door,I, of a fire-pot located in said recess and provided with a door, 0, andinclined chute D, leading into the firepot, fines E F, the former havingits ingressopening for the products of combustion in the front Wall andthe latter in the rear Wall of the oven, and the discharge-flue Gr,substantially as described, and for the purpose set forth.

5. In a bakers oven, a grate, B, set below the level of the sole A, andprovided with a suitable ash-pit, in combination With the fines E, F,and H, arranged substantially as and for 0 V V the purpose specified.

Toronto, April 9, 1880.

THOS. HUNTER. In presence of DONALD 0. Bloom, H. H. WARREN.

